ArrayList vs Array and ArrayList bs List

Question

Hi Can any one tell me what is difference b/w ArrayList and Array and ArrayList vs List....?

Vulpes · Answer

Briefly An array is a strongly typed collection of values of a particular type whose length cannot be changed once it has been created. An ArrayList is a weakly typed collection of values of any type (everything's stored internally as 'object') whose length is expanded at runtime as new values are added. A List is a strongly typed collection of values of type T whose length is expanded at runtime as new values are added. For value types a List is more efficient than an ArrayList because the value types don't have to be boxed on the heap (they are stored as their actual type in a List) and no casting is required.